Light bar



FIG. 1 is a top plan view of a light bar showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is an end elevational view thereof on an enlarged scale;

FIG. 6 is an opposite end view thereof on an enlarged scale. 

The ornamental design for a light bar, as shown and described. 